can anyone explain what the differences are between the current 4R70W and the upcoming 4R75E in the upcoming '04 f150s? thanks...

 

HI!... I'll take a guess. Since the 4R70-W stands for

4 = 4 speed

R = rear wheel drive application

70 = + add another zero (700) means the tranny can handle 700FT/LBS of torque. Don't forget though that the torque converter doubles the engine's torque figure.

W = wide ratio gear set



So I can only figure that the 4R75E stands for

4 = 4 speed

r = rear wheel drive application

75 = + add another zero (750) means the tranny can handle 750FT/LBS of torque. Don't forget though that the torque converter doubles the engine's torque figure.

E = electronic?????

I'd like to know this too. Can someone tell me if I'm correct or not?

 

well, i understand what the numbers and alphanumerics mean...what i wanna know are how are the internals different between the two trannies...

 

I can't believe that Ford would design a new transmission because they could just put in the 4R100 and the cost of development of a new trans. So now I gotta guess that the 4R75E is just a beefed up 4R70. How did they beef it up? I don't know but most liekly they added some discs to the clutches and may increase the line pressure in the valve body. I'm just guessing so I could be completely wrong.

Anyone go any hard facts on the 4R75E, please let us know.

- Dae

 

A slight improvement/redesign of the 4R70W, still shares a lot of common components with the older model.

G

 

Factory Tech - Do you know if they could be swapped out for one another? Are the computer modules that control them different?

 

This is off Ford's media site:

ENHANCED AUTOMATIC TRANSMISSIONS

Matched to the new 5.4-liter V-8 is a new 4R75E automatic transmission, an evolution of the 4R70E used on the current F-150. Upgraded to handle the torque of the 5.4-liter engine, this transmission shares patented upgrades with the 4R70E, which backs the 4.6-liter V-8:

-A redesigned torque converter improves launch performance and increases efficiency.
-A turbine speed sensor improves transmission control, providing the basis for fully electronic shift scheduling to limit "hunting" and to fine-tune shift speed and feel.
-Increased microprocessor speed improves responsiveness and precision of the control system.
-"Smart" fully electronic shift scheduling knows what the torque will be in the next gear so it chooses the shift points based on the vehicle's projected performance in the next gear.
-Coupled with the electronic throttle strategy, the transmission computes the output torque required to maintain the vehicle speed, and chooses the correct gear and converter state accordingly.
-A sealed case and lifetime transmission fluid make the transmission maintenance free, while adaptive pressure control maintains consistent shift feel over time.

By predicting the performance of the truck in the next gear, the computer-controlled transmissions provide a more sophisticated solution to heavy demands than a simple shift delay switch, such as the one-size-fits-all "towing mode" some competitors use.


Link:
http://media.ford.com/products/press...423&make_id=92

 

So I wonder if the trans. is serviceable? If there is a problem, do you have to put in a new transmission?

 

Yeah - huge draw back there. If you can't change the tranny fluid, you'll probably be replacing the tranny in 100,000 miles.

 

You can always have the shop disconnect the cooler lines and do a flush and fill, even if it is sealed. The only thing is you wouldn't be changing a filter, which according to some doesn't need to be done anyway.

I'd still swap it every 25-30k anyway. Cheap insurance for a $3K or more replacement cost.

John

 

And also keep in mind, that they (Ford) don't expect that many of these trucks will be driven like trucks and be really worked. I imiagine that a tranny filter would last a lot longer in a truck that is just driven daily to and from work and never has anything but snow and leaves in the bed.